pcshow, pointcloud: plot points with intensity.

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Fernando Arias 2018-5-24

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https://ww2.mathworks.cn/matlabcentral/answers/402412-pcshow-pointcloud-plot-points-with-intensity

编辑： Image Analyst 2018-5-24

Hi, I'm having some problems with the pointcloud structures. Firstly my data are a 3Dimension array (200,200,160), where each index represent a coordinate, y,x,z respectively, and the value of the array represents the number of points in theese coordinates. For example, if my array 'A', and A(10,20,100)=4, means that I have 4 points in Y=10, X=20 and Z=100. I did a PointCloud structure with this code:

[X,Y,Z] = ind2sub(size(A),1:numel(A));
mat = repelem([X(:),Y(:),Z(:)],A(:),1,1);
ptCloud = pointCloud(mat);

I need the pointCloud becouse I'm working with pcregistericp. But now I need to plot this data, so I was thinking plot it with pcshow, but I would need to asign transparency inversely proportional to the number of points in each coordinates.

I hope it is clear, I'm not good explining.

I tried also with scatter3, but there are too many points, so it doesn't work. If someone can help me with an idea, it would be great for me.

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Image Analyst 2018-5-24

编辑：Image Analyst 2018-5-24

It would be clearer if you had attached "A" in a .mat file and had included a screenshot. If there are too many points, then maybe you don't need ALL of those to get your point across in your visualization. Try displaying only a fraction of them.

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